COD,
Having gone through this type of thing so recently, basically just absolute ignorant behavior and total disregard for your feelings, I feel your pain. Keep trying your best to distance yourself as much as you can. When the fight comes to you, I know sometimes you can't avoid it. I think some of them do like to fight sometimes unfortunately, sort of like another emotional need when the drink gets to a certain level. Experienced that as well. Or argue, or debate, or whatever you want to call it.
I got really good at finding other rooms or other places to go, and especially headphones at home when the music or TV or whatever else got so loud to somehow try and get me to pick the fight.
Walk away when you can, I know you are still in a place that you want to be at home, and as someone who allowed it to go on for so long, I understand, and post whatever you want here and you know we'll listen.